Wrote to Massdrop, explained it was legal. I'll share with you all what "Kelly" from customer service explained as the reason they can't ship this to the country that made carrying oversized knives fashionable:

"this knife is technically not illegal in Australia, Customs tends to confiscate items like this, therefore we are unable to extend the shipping to Australia".

Thats why you can buy it online from at least half a dozen online vendors located within Australia. Probably some S.A. based doucheball customs agent confiscated one last halloween..... but it wouldnt have been because of the serrations --Ive heard them doing that to the original kabar on the grounds that it was a fighting weapon .

They already have a notification at the bottom of the page of the drop for buyer beware, I dont understand why they don't leave the option up to us as to whether or not we risk it getting stuck in custom.